Tariffs that will effectively double the price of everything that comes from China to the United States are set to take effect at midnight on Wednesday, as Beijing stands firm on its plan to slap retaliatory duties on US imports in response to Donald Trump's "Liberation Day" tariffs. Meanwhile, the White House says nearly 70 countries have come forward in a bid to negotiate a deal out of the punitive tariffs. US stocks tumbled again this Tuesday after a brief rally.